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chromium toxicity

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https://www.readbyqxmd.com/read/28810231/cr-induced-cellular-injury-and-necrosis-in-glycine-max-l-biochemical-mechanism-of-oxidative-damage-in-chloroplast
#1
Kalimuthu Balasaraswathi, Sivalingam Jayaveni, Janardhanam Sridevi, Dhanasingh Sujatha, Kavati Phebe Aaron, Chellan Rose
Chromium-induced toxicity and mechanisms of cell death involved in plants are yet to be fully elucidated. To understand the events of these processes, the stress response of the soybean plant using trivalent and hexavalent chromium compounds, namely, basic chromium sulphate (BCS) and potassium dichromate (K2Cr2O7) was investigated. The leaf surface morphology for stomatal aperture, wax deposition and presence of trichomes for chromium accumulation was examined by SEM-EDAX and light microscopy. The leaf mesophyll cell integrity was identified by trypan blue staining; chlorophyll autofluorescence, ROS generation and mitochondrial function were studied by fluorescence microscopy using different dyes...
August 2, 2017: Plant Physiology and Biochemistry: PPB
https://www.readbyqxmd.com/read/28809623/how-to-choose-between-the-implant-materials-steel-and-titanium-in-orthopedic-trauma-surgery-part-2-biological-aspects
#2
S M Perren, P Regazzoni, A A Fernandez
BIOLOGICAL ASPECTS OF STEEL AND TITANIUM AS IMPLANT MATERIAL IN ORTHOPEDIC TRAUMA SURGERY The following case from the ICUC database, where a titanium plate was implanted into a flourishing infection, represents the clinical experience leading to preferring titanium over steel. (Fig. 1) (6). Current opinions regarding biological aspects of implant function. The "street" opinions regarding the biological aspects of the use of steel versus titanium as a surgical trauma implant material differ widely. Statements of opinion leaders range from "I do not see any difference in the biological behavior between steel and titanium in clinical application" to "I successfully use titanium implants in infected areas in a situation where steel would act as foreign body "sustaining" infection...
2017: Acta Chirurgiae Orthopaedicae et Traumatologiae Cechoslovaca
https://www.readbyqxmd.com/read/28809442/simultaneous-degradation-and-removal-of-cr-vi-from-aqueous-solution-with-zr-based-mofs-bearing-inherent-reductive-sites
#3
Zhe Wang, Jian Yang, Yongsheng Li, Qixin Zhuang, Jinlou Gu
Given the serious harm of chromium Cr(VI) to human health, development of efficient techniques for its degradation and subsequent in situ adsorptive removal is highly desirable. Herein, UiO-66 type MOFs integrated with various hydroxyl groups (UiO-66, UiO-66-OH, and UiO-66-(OH)2) were successfully explored for the efficient decontamination of Cr(VI) from aqueous solution. The abundant hydroxyl groups in organic ligands not only served as reductive sites for the degradation of Cr(VI) to less toxic Cr(III) but also acted as inherent anchorages for the efficient capture of Cr(III)...
August 15, 2017: Chemistry: a European Journal
https://www.readbyqxmd.com/read/28791837/the-role-of-17%C3%AE-estradiol-metabolites-in-chromium-induced-oxidative-stress
#4
Ewa Sawicka, Anna Długosz
BACKGROUND: The increasing incidence of estrogen-dependent breast cancer and the presence in the environment of a large number of factors that interact with estrogen receptors have sparked interest in chemical influences on estrogen-dependent processes. In a previous work, the authors examined the interaction of estradiol with chromium. In the present article the importance of estradiol biotransformation in these interactions is investigated. There is no information in the available literature about the role of metabolites in exposure to chromium...
March 2017: Advances in Clinical and Experimental Medicine: Official Organ Wroclaw Medical University
https://www.readbyqxmd.com/read/28755953/kidney-toxicity-related-to-herbs-and-dietary-supplements-online-table-of-case-reports-part-3-of-5-series
#5
REVIEW
Amy Christine Brown
BACKGROUND: No tabular summary of potentially life-threatening, kidney-toxic dietary supplements (DS; includes herbs) based on PubMed case reports is currently available online and continually updated to forewarn United States consumers, clinicians, and companies manufacturing DS. The purpose of this review was to create an online research summary table of kidney toxicity case reports related to DS. METHODS: Documented PubMed case reports (1966 to May 2016, and cross-referencing) of DS appearing to contribute to kidney toxicity were listed in "DS Toxic Tables...
September 2017: Food and Chemical Toxicology
https://www.readbyqxmd.com/read/28751028/toxic-metals-biomonitoring-based-on-prey-predator-interactions-and-environmental-forensics-techniques-a-study-at-the-romanian-ukraine-cross-border-of-the-black-sea
#6
Stefan-Adrian Strungaru, Mircea Nicoara, Carmen Teodosiu, Dragos Micu, Gabriel Plavan
Marine cross-border areas are ideal for monitoring pollutants so as to increase ecosystems protection. This study was conducted at the Romanian-Ukraine border of the Black Sea to reveal evidence of contamination with toxic metals based on biomonitoring of: cadmium, lead, total chromium, nickel and copper at different water depths and prey-predator interactions, combined with environmental forensics techniques of biological sampling and separation in witnesses size groups. The species used were Mytilus galloprovincialis L...
July 25, 2017: Marine Pollution Bulletin
https://www.readbyqxmd.com/read/28731297/smart-capsules-for-lead-removal-from-industrial-wastewater
#7
Bartosz Tylkowski, Renata Jastrząb
Ground and especially drinking water could be contaminated by heavy metal ions such as lead and chromium, or the metalloid arsenic, discarded from industrial wastewater. These heavy metal ions are regarded as highly toxic pollutants which could cause a wide range of health problems in case of a long-term accumulation in the body. Thus, there have been many efforts to reduce the concentration of lead ions in effluent wastewater. They have included the establishment of stringent permissible discharge levels and management policies, the application of various pollution-control technologies, and the development of adsorbent materials for lead reduction...
April 10, 2017: Metal Ions in Life Sciences
https://www.readbyqxmd.com/read/28728354/spatial-assessment-of-potential-ecological-risk-of-soil-heavy-metals-from-informal-e-waste-recycling-in-ghana
#8
Vincent Nartey Kyere, Klaus Greve, Sampson Atiemo, James Hawkins Ephraim
The rapidly increasing annual global volumes and the inherently valuable fractions of e-waste have created an avenue for individuals in Agbogbloshie, Accra, Ghana to make a living by utilizing unconventional, uncontrolled, primitive and crude procedures to recycle and recover valuable metals from these wastes. The current form of recycling procedures releases hazardous fractions such as heavy metals into the soils posing a significant risk to ecology and human health. 132 soil samples based on 100 m grid intervals were collected using handheld GPS and analyzed for Cadmium (Cd), chromium (Cr), copper (Cu), mercury (Hg), lead (Pb) and zinc (Zn) heavy metals...
July 10, 2017: Environmental Health and Toxicology
https://www.readbyqxmd.com/read/28722486/neurotoxic-effects-of-subchronic-intratracheal-mn-nanoparticle-exposure-alone-and-in-combination-with-other-welding-fume-metals-in-rats
#9
Zsuzsanna Máté, Edina Horváth, András Papp, Krisztina Kovács, Etelka Tombácz, Dániel Nesztor, Tamás Szabó, Andrea Szabó, Edit Paulik
Manganese (Mn) is a toxic heavy metal exposing workers in various occupational settings and causing, among others, nervous system damage. Metal fumes of welding, a typical source of Mn exposure, contain a complex mixture of metal oxides partly in nanoparticle form. As toxic effects of complex substances cannot be sufficiently understood by examining its components separately, general toxicity and functional neurotoxicity of a main pathogenic welding fume metal, Mn, was examined alone and combined with iron (Fe) and chromium (Cr), also frequently found in fumes...
July 19, 2017: Inhalation Toxicology
https://www.readbyqxmd.com/read/28712470/field-proteomics-of-populus-alba-grown-in-a-heavily-modified-environment-an-example-of-a-tannery-waste-landfill
#10
Agnieszka Szuba, Gabriela Lorenc-Plucińska
Tannery waste is highly toxic and dangerous to living organisms because of the high heavy metal content, especially chromium [Cr(III)]. This study analysed the proteomic response of the Populus alba L. clone 'Villafranca' grown for 4years on a tannery waste landfill. In this extremely hostile environment, the plants struggled with continuous stress, which inhibited growth by 54%, with a 67% decrease in tree height and diameter at breast height compared to those of the forest reference plot, respectively. The leaves and roots of the tannery landfill-grown plants produced strong proteomic stress signals for protection against reactive oxygen species (ROS) and repair to ROS-damaged proteins and DNA as well as signals for protection of the photosynthetic apparatus...
July 13, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28712078/effects-based-spatial-assessment-of-contaminated-estuarine-sediments-from-bear-creek-baltimore-harbor-md-usa
#11
Sharon E Hartzell, Michael A Unger, Beth L McGee, Lance T Yonkos
Estuarine sediments in regions with prolonged histories of industrial activity are often laden to significant depths with complex contaminant mixtures, including trace metals and persistent organic pollutants. Given the complexity of assessing risks from multi-contaminant exposures, the direct measurement of impacts to biological receptors is central to characterizing contaminated sediment sites. Though biological consequences are less commonly assessed at depth, laboratory-based toxicity testing of subsurface sediments can be used to delineate the scope of contamination at impacted sites...
July 15, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28703781/investigation-pollution-mapping-and-simulative-leakage-health-risk-assessment-for-heavy-metals-and-metalloids-in-groundwater-from-a-typical-brownfield-middle-china
#12
Fei Li, Zhenzhen Qiu, Jingdong Zhang, Wenchu Liu, Chaoyang Liu, Guangming Zeng
Heavy metal and metalloid (Cr, Pb, Cd, Zn, Cu, Ni, As and Hg) concentrations in groundwater from 19 typical sites throughout a typical brownfield were detected. Mean concentrations of toxic metals in groundwater decreased in the order of Cr > Zn > Cu > Cd > Ni > Pb > Hg > As. Concentration of Cr(6+) in groundwater was detected to further study chromium contamination. Cr(6+) and Cd in groundwater were recommended as the priority pollutants because they were generally 1399-fold and 12-foldgreater than permissible limits, respectively...
July 13, 2017: International Journal of Environmental Research and Public Health
https://www.readbyqxmd.com/read/28693103/functionalized-magnetic-iron-oxide-polyacrylonitrile-composite-electrospun-fibers-as-effective-chromium-vi-adsorbents-for-water-purification
#13
Rui Zhao, Xiang Li, Yumei Li, Yanzi Li, Bolun Sun, Nan Zhang, Shen Chao, Ce Wang
Inorganic/organic composite electrospun fibers have been extensively investigated as adsorbents for the wastewater treatment. In this study, branched polyethylenimine (b-PEI) functionalized magnetic iron oxide (Fe3O4)/polyacrylonitrile (PAN) composite electrospun fiber adsorbent (b-PEI-FePAN) was fabricated and systematically explored for the removal of toxic hexavalent chromium [Cr(VI)]. b-PEI grafted PAN organic component not only acted as the flexible substrate to load Fe3O4 particles but also made a contribution to the improved adsorption capacity...
June 29, 2017: Journal of Colloid and Interface Science
https://www.readbyqxmd.com/read/28683391/biodegradable-alternative-for-removing-toxic-compounds-from-sugarcane-bagasse-hemicellulosic-hydrolysates-for-valorization-in-biorefineries
#14
T Silva-Fernandes, J C Santos, F Hasmann, R C L B Rodrigues, H J Izario Filho, M G A Felipe
Among the major challenges for hemicellulosic hydrolysate application in fermentative processes, there is the presence of toxic compounds generated during the pretreatment of the biomass, which can inhibit microbial growth. Therefore, the development of efficient, biodegradable and cost-effective detoxification methods for lignocellulosic hydrolysates is crucial. In this work, two tannin-based biopolymers (called A and B) were tested in the detoxification of sugarcane bagasse hydrolysate for subsequent fermentation by Candida guilliermondii...
June 15, 2017: Bioresource Technology
https://www.readbyqxmd.com/read/28681292/biochars-mitigate-greenhouse-gas-emissions-and-bioaccumulation-of-potentially-toxic-elements-and-arsenic-speciation-in-phaseolus-vulgaris-l
#15
Muhammad Ibrahim, Gang Li, Sardar Khan, Qiaoqiao Chi, Yaoyang Xu
Anthropogenic and natural activities can lead to increased greenhouse gas emissions and discharge of potentially toxic elements (PTEs) into soil environment. Biochar amendment to soils is a cost-effective technology and sustainable approach used to mitigate greenhouse gas emissions, improve phytoremediation, and minimize the health risks associated with consumption of PTE-contaminated vegetables. Greenhouse pot experiments were conducted to investigate the effects of peanut shell biochar (PNB) and sewage sludge biochar (SSB) on greenhouse gas (GHG) emissions, plant growth, PTE bioaccumulation, and arsenic (As) speciation in bean plants...
July 5, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28675125/toxic-and-essential-metals-in-cyprinus-carpio-carassius-gibelio-and-luciobarbus-esocinus-tissues-from-keban-dam-lake-pertek-turkey
#16
Gokce Kaya, Semra Turkoglu
In various tissues of Luciobarbus esocinus, Cyprinus carpio and Carassius gibelio which were taken from Keban Dam Lake Pertek region's freshwaters, Turkey in January-February 2016, concentrations of mercury, nickel, lead, cadmium, arsenic, manganese, chromium and cobalt were analyzed by ICP-MS after microwave digestion. In fish muscle mean chromium concentration (0.614 mgkg(-1) in C. carpio muscle) was higher than the maximum limits as set by the Federal Environmental Protection Agency (2003) and World Health Organisation (1985)...
July 4, 2017: Food Additives & Contaminants. Part B, Surveillance
https://www.readbyqxmd.com/read/28665617/synthesis-of-a-multifunctional-graphene-oxide-based-magnetic-nanocomposite-for-efficient-removal-of-cr-vi
#17
Dongfang Wang, Guilong Zhang, Linglin Zhou, Min Wang, Dongqing Cai, Zhengyan Wu
A novel magnetic nanocomposite was synthesized using graphene oxide (GO), polyethylenimine (PEI), and Fe3O4 to removal hexavalent chromium (Cr(VI)) from water and soil. Therein, GO was functionalized with plenty of -NH2 by the modification of PEI through an amidation reaction, and the resulting GO/PEI reacted with FeSO4·7H2O and NaBH4 to obtain RGO/PEI/Fe3O4 (the optimal one is designated as ORPF) through an oxidation-reduction reaction. ORPF could effectively adsorb Cr(VI) through electrostatic attraction, and the adsorbed Cr(VI) ions were partially reduced to trivalent chromium (Cr(III)) with low toxicity by RGO (π electron)...
July 10, 2017: Langmuir: the ACS Journal of Surfaces and Colloids
https://www.readbyqxmd.com/read/28664715/the-history-of-arsenical-pesticides-and-health-risks-related-to-the-use-of-agent-blue
#18
Vladimir Bencko, Florence Yan Li Foong
Arsenicals in agriculture. Beginning in the 1970s, the use of arsenic compounds for such purposes as wood preservatives, began to grow. By 1980, in the USA, 70% of arsenic had been consumed for the production of wood preservatives. This practice was later stopped, due to the US Environmental Protection Agency (EPA) ban of the arsenic-and chromium-based wood preservative chromated copper arsenate. In the past, arsenical herbicides containing cacodylic acid as an active ingredient have been used extensively in the USA, from golf courses to cotton fields, and drying-out the plants before harvesting...
June 12, 2017: Annals of Agricultural and Environmental Medicine: AAEM
https://www.readbyqxmd.com/read/28660804/evaluation-of-the-molecular-mechanisms-associated-with-cytotoxicity-and-inflammation-after-pulmonary-exposure-to-different-metal-rich-welding-particles
#19
Mohammad Shoeb, Vamsi Kodali, Breanne Farris, Lindsey M Bishop, Terence Meighan, Rebecca Salmen, Tracy Eye, Jenny R Roberts, Patti Zeidler-Erdely, Aaron Erdely, James M Antonini
Welding generates a complex aerosol of incidental nanoparticles and cytotoxic metals, such as chromium (Cr), manganese (Mn), nickel (Ni), and iron (Fe). The goal was to use both in vivo and in vitro methodologies to determine the mechanisms by which different welding fumes may damage the lungs. Sprague-Dawley rats were treated by intratracheal instillation (ITI) with 2.0 mg of gas metal arc-mild steel (GMA-MS) or manual metal arc-stainless steel (MMA-SS) fumes or saline (vehicle control). At 1, 3, and 10 days, bronchoalveolar lavage (BAL) was performed to measure lung toxicity...
June 29, 2017: Nanotoxicology
https://www.readbyqxmd.com/read/28660513/the-biological-responses-and-metal-phytoaccumulation-of-duckweed-spirodela-polyrhiza-to-manganese-and-chromium
#20
Ying Liu, Tanatcha Sanguanphun, Wenqiao Yuan, Jay J Cheng, Metha Meetam
The phytoaccumulation ability of duckweed Spirodela polyrhiza on manganese (Mn) and chromium (Cr) was assessed by exposing the plant to various concentrations of single or dual metals (5-70 mg L(-1) Mn, 2-12 mg L(-1) Cr(VI)) under laboratory conditions. The results showed that S. polyrhiza can tolerate Mn at high concentrations of up to 70 mg L(-1), and its growth rate was barely affected by Mn. The effects of Cr on S. polyrhiza growth were dose-dependent, and the growth was completely inhibited in the presence of 12 mg L(-1) Cr...
June 28, 2017: Environmental Science and Pollution Research International
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